News released on March 23, 2026: Polyurethane (PU), a widely used elastic material in industry, can be found in coatings, adhesives, sponges and other products. However, its flammability poses potential safety hazards. Traditional halogenated flame retardants have good flame retardant effects, but they release a large amount of toxic smoke when burned, endangering human health and polluting the environment. Halogen-free flame retardants have become the preferred choice for flame retardant upgrading of oil-based PU systems due to their advantages of low toxicity, low smoke and environmental protection. Halogen-free flame retardants take phosphorus, nitrogen and metal hydroxides as core components, functioning through dual mechanisms of condensed-phase flame retardancy and gas-phase flame retardancy. The phosphorus-nitrogen system forms a dense carbonized layer when heated to isolate oxygen and heat sources; aluminum hydroxide and magnesium hydroxide absorb heat and release water vapor at high temperatures to cool down and dilute combustible gases. This technology balances safety and environmental protection, conforms to the green development trend of industry, and helps PU materials be safely applied in more scenarios. For more information, please visit: https://www.tiktok.com/@mia_iota/video/7597717976720149782